Combination adjustable plug and planer gauge



March 29, 1949. H. HARRIS 2,465,449

I COMBINATION ADJUSTABLE PLUG AND PLANER GAUGE Filed Nov. 24, 1945 2 Sheets- Sheet 1 Inventor m jrrzis' M March 29, 1949. H. HARRIS 2,465,449

COMBINATION ADJUSTABLE PLUG AND PLANER GAUGE Filed Nov. 24, 1943 2 Sheets-Sheet 2 Inventor 25 z Attamejs Patented Mar. 29, 1949 COMBINATIGN ADJUSTABLE PLUG AND PLANER GAUGE Harry Harris, Schenectady, N. Y. Application November 24, 1943, Serial No. 511,599

3 Claims.

The present invention appertains to a combination or multiple purpose adjustable plug and planer gage, that is, a novel two-way precision tool so constructed and adapted as to function in accurately measuring inside diameters of bores, sockets and the like while serving, secondarily, as an ordinary or standard type planer gage.

As will be more satisfactorily evident from the following description, and the accompanying illustrative drawings, I have a precision tool of outstanding accuracy, simplicity and long life, the component parts being so designed and coacting as to provide for positive feel such as attends a properly constructed regular plug gage, there being an accessory or attachment added which when applied adapts the structure to function adequately as a planer gage.

In reducing to practice the preferred embodiment of the invention I have chosen mechanical elements and a proper association thereof which serve to adapt the tool for use by uninitiated and semi-skilled hands capable of using in connection with the tool a measuring micrometer.

More specifically, the overall structure is such as to imbue the user or operator with greater confidence because of the adaptability to make the measurements before the finished cut is made and to therefore speed H up production and cut down on spoilage.

Furthermore, the tool is susceptible of appropriate and reliable use on all types of lathes, jig-borers, internal grinders and is highly successful for use by assemblers and tool makers on the bench with the aforementioned added advantage of being converted into a planer gage.

Then too, and because of the structural adaptations embodied the tool is not only highly useful and aptly fitted for employment in tool development rooms but is otherwise practicable and feasible for fulfilling the requirements of other functions and uses too numerous to mention.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings.

In the drawings, wherein like numerals are employed to designate like parts throughout the same:

Figure 1 is a side elevational view of a precision tool constructed in accordance with the principles of this invention showing how the foot-like adapter bracket or fixture is temporarily fastened in place to maintain the frame or main body in a substantially perpendicular position.

evolved and produced the preferred embodiment of Figure 2 is an edge or elevational view, that is, a view observing the structure seen in Figure 1 in a direction from right to left.

Figure 3 is also a side elevational view, this showing adapter foot attached in longitudinal alignment with the triangular frame or body to maintain the latter in a satisfactory horizontal position for use as a planer gage, the extensible and retractible posts being here shown.

Figure 4 is an enlarged central longitudinal section through the structure seen in Figure 1, this serving to bring out the detailed construction of complemental or component parts.

Figure 5 is a section on the line 5-5 of Figure 4.

Figure 6 is a perspective view of the sectional height measuring post.

Figure 7 is a perspective view of a desirable type, that is, a T-shaped type of slide assembling and keying unit.

Figures 8 and 9 are detail fragmentary sections on the lines 8-8 and 99, respectively, of Figure 4.

As will be observed the complete structural arrangement is characterized essentially by three main parts; namely, a right angle triangular body or frame 10, an adjustable slide I I and an adapter attachment or foot l2.

The part In is somewhat conventional in that the hypotenuse edge is provided with a slideway lfla for the slidable block II. The slideway is preferably cylindrical in cross-sectional form to accommodate a correspondingly shaped key l3. This key is provided with a centrally disposed right angularly arranged stem M screw-threaded as at I5. This stem extends through a passage in the central or median area of the slide block ll. At this point the block is provided with a socket to accommodate a thumb nut ll threaded on the screw-threaded portion [5 of the stem. A split spring washer l8 surrounds the stem l4 and is interposed between the bottom of the socket and the adjacent inner end of the clamping nut N. This provides a yieldable yet sensitive keying and clamping arrangement for the slide block. The slot which leads into the keyway Illa is provided with beveled walls and the adjacent beveled inner end portion of the slide block coacts therewith with nicety as brought out to advantage in Figure 5. This provides a sensitive adjustment and avoids side-wobbling or displacement of the block in relation to its base or body Ill.

The slide block is provided with a main step or shoulder IQ and relatively smaller auxiliary steps 20 and 2!, the latter steps defined by kerfs or grooves 22. It is to be noticed that the work engaging surfaces of the steps 19, 29 and 2| are curvate or convex to provide various radii. The radius, for example, of the step 2! seen in Figure 8 is one-eighth of an inch while the radius of the step I 9 (see Figure 9) is a one-half inch radius. At this stage attention is directed to the longitudinal lower edge of the body i9 which is also convex in cross sectional dimension. Here, in the form of the invention shown, a one-eighth inch radius is provided as indicated at 23. This is the main or relatively fixed gaging edge, said edge 23, coacting selectively with the shoulders or steps I9, 20 and 2! according to choice of the user. The distances of the steps may be varied, obviously, by shifting the gage block l along the hypotenuse edge, the keying means serving to permit this and the clamping means serving to retain the block in any desired adjusted position.

It will be noticed in Figure 4 that the principal or main shoulder i9 is provided with intersecting screw-threaded bores 29 and 25, respectively, the mouth of the bore 24 being provided with a seat or recess 26. These features 24, 25 and 26 serve to accommodate the sectional post shown in Figure 6. The post is here shown as made up of complemental parts 21 and 28. The part 21 is provided with a stem or shank 29 to tap into the holes 24 or 25 whichever be selected. The opposite end is provided with a socket 39 to accommodate the screw-threaded shank 3! on the companion post section 28. These parts 2'5 and 28 may be used singly or collectively. They are employed either as shown in dotted lines in Figure 4 or as shown in full lines in Figure 3, in which instance the device is seen serving as a planer gage,

It is evident that the parts I9 and H cooperating as a unitary structure may be used with or without the attachment foot or fixture It. This part I 2 is of triangular form and is bifurcated at one end. The furca-tions or flanges 33 fit either over the longitudinal edge 23 as shown in Figures 1 and 4 or they may be adjusted to fit over the butt end as shown in Figure 3, the block being held in place by set-screws 3 5.

The main part of this tool or gage is the unit composed of the frame If! and companion slide l l inasmuch as this is the adjustable plug gage. The attachment block or foot may be added, when desired, to hold the plug gage in an upright position for use as a planer gage as brought out for example in Figure 1 of the drawings. However and as shown in Figure 3 the block-like foot may also be added to one end to retain the structure in its horizontal planer gage position. The model or structure shown isa relatively small tool and is used to measure holes from one-quarter of an inch in diameter to one inch in diameter. However, the proportions may be obviously changed to suit conditions and circumstances.

The slide is held on the base with just enough tension by the nut l7 and spring or look washer IB so that when the gage is pulled out from the socket or hole being measured, it will still stay in place for micrometer measurements.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in the shape, size and arrangement of details coming within the field of invention claimed may be resorted to in actual practice, if desired.

Having described the invention as new is:

1. A plug gage of the class described comprising a body, a slide adjustably mounted on said body, and a block-like foot of triangular form, one end of said foot being bifurcated and the furcations being adapted to be optionally and selectively used in a manner to straddle either a longitudinal edge portion, or, one butt end portion of said body, and means for detachably holding said foot in place on said body, whereby to permit said foot to be disposed in a position to support the body perpendicularly, or to support it in a horizontal position, as the case may be.

2. A gauge of the character described, comprising a triangular frame with two sides at right angles, both sides being provided with gauging surfaces and with a third side inclined with respect to the two other sides and provided with a slideway ,a. slide movable along the slideway, means to fix the slide in a given position on said siiclcway, a measuring head arranged on said slide, said head being provided with gauging members having substantially plane gauging surfaces, further gauging members on said head provided with convex gauging surfaces adapted to enter into cavities and to measure inside dimensions, one of the gauging surfaces on the triangular frame being a convex gauging surface co-operating with the convex gauging surfaces on the measuring head of the slide, the other gauging surface on the frame being a plane surface, a detachable foot piece provided with a plane base and with flange means for attachment on the frame, means carried by said flange means for attaching said foot piece with its base in alignment with the outermost edge of the convex gauging surface on one side of said frame well as for attaching said detachable foot piece with its plane base in alignment with the plane gauging surface on said frame, the foot piece thus forming an extension of said gauging surfaces.

3. A gauge of the character described as specified in claim 2, wherein the flange means for attaching the foot piece to the frame comprises a bifurcated lateral portion fitting over plane and convex edges alike.

,what is claimed HARRY HARRIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 305,993 Austin Sept. 30, 1864 386,469 Howard July 24, 1888 1,228,791 Laubscher June 5, 1917 2,219,180 Fichter Oct. 22, 1940 2,242,116 Donaway May 13, 1941 

